I highly recommend Ironwear gloves. I've tried several different types of weighted gloves, and Ironwear is the most comfortable. They are filled with a pliable, heavy rubber, which fits around the hand very nicely. And the weight is nicely distributed between the palm and the back of the hand.
I've tried several different types of weighted gloves over the years (maybe a half-dozen?) Some have the weight mostly on the back of the hand, and they felt unbalanced to me (maybe because I have small hands and wrists). Those that are filled with sand shift too much. I rarely disagree with Carole, ;-) , but I tried the ones from Walmart (the same 1.5 pair, I'm sure: they were black and yellow), and they irritated the skin on my hands where the gloves bent. Too hard, like bent metal rather than soft rubber.
Ironwear is a manufacturer that makes weighted accessories (gloves, vests, ankle weights) for other brands. I've seen them at Target (years ago), which is where I got my first pair of gloves and a pair of ankle weights that can also be used as a belt, at Reebok (I ordered a weighted vest from the Reebok site--when they had a free-shipping deal, and bought a second pair of 1#--the size I use for kickboxing, at a Reebok factory outlet store near me), at Janis Saffel's site (though I think she's not carrying them anymore). I also ordered a couple of pair of heavier Ironwear gloves (2 and 3#) from an internet site I found by searching "ironwear glove."